I downloaded the rulebook in three parts. I've searched through them all, but I'm unable to find this. It says in the magic section that you must roll randomly to see what kind of spells your wizard has. However, i could not find how many spells they start with. Or if they will gain new spells from experience. Can somebody point me to where this is mentioned in the rulebooks?

Okay... it's still not very clear to me. But this is what I got. When you first create a wizard, they only know one spell, which you roll for randomly. Then when they would gain a skill, you can instead choose to roll again for a new spell, correct?